Boss bars

effectcreate bossbar [<id>]

The id names the bar so it can be updated or removed later; without one the id is default

create bossbar titled "&r&lEvent Boss" with color red with progress 100 for all players

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expressiontitled <text>

The text on the bar

create bossbar titled "&r&lEvent Boss" with color red with progress 100 for all players

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effectwith color <colour>

pink, blue, red, green, yellow, purple or white (the default)

create bossbar titled "&r&lEvent Boss" with color red with progress 100 for all players

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effectwith progress <0-100>

How full the bar is, in percent; the default is 100

create bossbar titled "&r&lEvent Boss" with color red with progress 100 for all players

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effectwith segments <n>since 1.7.3

Notches along the bar: 6, 10, 12 or 20. Any other number gives a plain bar

create bossbar "lives" titled "&cLives" with color red with segments 10 with progress 70 for player

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structurefor <who>

Who sees it

create bossbar titled "&r&lEvent Boss" with color red with progress 100 for all players

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structurefor <n> seconds

Optional: remove the bar after this long

create bossbar "raid" titled "&cRaid: %{_left}% left" with progress {_left} / 8 * 100 for player for 30 seconds

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structurefor <n> seconds counting downsince 1.7.59

The bar empties by itself as the time runs, and is removed at the end

command /round:
    trigger:
        create bossbar "round" titled "&cRound ends" for all players for 30 seconds counting down

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effectremove bossbar [<id>]

Remove the bar for everyone

remove bossbar "raid"

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Guide and examples

create bossbar titled "&r&lEvent Boss" with color red with progress 100 for all players
create bossbar "raid" titled "&cRaid: %{_left}% left" with progress {_left} / 8 * 100 for player for 30 seconds
remove bossbar "raid"

Part	Meaning
`create bossbar [<id>]`	The id names the bar so it can be updated or removed later; without one the id is `default`
`titled <text>`	The text on the bar
`with color <colour>`	`pink`, `blue`, `red`, `green`, `yellow`, `purple` or `white` (the default)
`with progress <0-100>`	How full the bar is, in percent; the default is 100
`with segments <n>`	Notches along the bar: 6, 10, 12 or 20. Any other number gives a plain bar
`for <who>`	Who sees it
`for <n> seconds`	Optional: remove the bar after this long
`for <n> seconds counting down`	The bar empties by itself as the time runs, and is removed at the end
`remove bossbar [<id>]`	Remove the bar for everyone

Creating a bar whose id already exists updates it (title, colour, progress) and adds the new viewers, so a countdown is just the same create bossbar line run again with a new progress.
A bar shown to all players is also shown to players who join later.
Bars are removed when the plugin is disabled; they do not survive a restart.